Vertically aligned P(VDF-TrFE) core-shell structures on flexible pillar arrays.
Vertically aligned P(VDF-TrFE) core-shell structures on flexible pillar arrays.
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DOI：
10.1038/srep10728
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发表时间：
2015-06-04
影响因子：
4.6
通讯作者：
No K
中科院分区：
文献类型：
--
作者：
Choi YY;Yun TG;Qaiser N;Paik H;Roh HS;Hong J;Hong S;Han SM;No K
PVDF和P(VDF-TrFE)纳米和微结构由于其在传感器、执行器、生命体征传感器和能量采集器等领域的潜在应用而得到了广泛的应用。在这项研究中，我们开发了垂直排列的P(VDF-TrFE)核壳结构，以高模数聚氨酯丙烯酸酯(PUA)柱为支撑结构，以保持结构的完整性。此外，通过有效地利用P(VDFTrFE)薄顶层和侧壁，我们还能够将压电效应从40 ± 2提高到74 ± 2 pm/V，从而在给定的应力下有助于更有效地产生电流。我们将压电效应的增强归因于壳层组件和应变约束效应的贡献，这与我们的模拟结果是一致的。我们预计，这些基于有机的P(VDF-TrFE)核壳结构将被广泛用作3D传感器和发电机，因为它们通过利用所有表面积(包括核壳结构的侧壁)针对当前的发电进行了优化。
PVDF and P(VDF-TrFE) nano- and micro- structures have been widely used due to their potential applications in several fields, including sensors, actuators, vital sign transducers, and energy harvesters. In this study, we developed vertically aligned P(VDF-TrFE) core-shell structures using high modulus polyurethane acrylate (PUA) pillars as the support structure to maintain the structural integrity. In addition, we were able to improve the piezoelectric effect by 1.85 times from 40 ± 2 to 74 ± 2 pm/V when compared to the thin film counterpart, which contributes to the more efficient current generation under a given stress, by making an effective use of the P(VDF-TrFE) thin top layer as well as the side walls. We attribute the enhancement of piezoelectric effects to the contributions from the shell component and the strain confinement effect, which was supported by our modeling results. We envision that these organic-based P(VDF-TrFE) core-shell structures will be used widely as 3D sensors and power generators because they are optimized for current generations by utilizing all surface areas, including the side walls of core-shell structures.
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